The invention provides a current-limiting fuse used for protecting an
ozone high-frequency
discharge unit. The current-limiting fuse comprises a shell body provided with
copper caps on both ends, a fuse body unit communicated with the two
copper caps is arranged inside the shell body, the shell body is filled with
quartz sand, the fuse body unit comprises a fuse body, and
metal or
alloy with a fusing point lower than that of the fuse body is arranged on the fuse body. The current-limiting fuse is simple, reasonable and compact in structure, enhances the connecting / disconnecting capacity by adopting a design of combining metallurgical effects with
multiple fractures, enhances arc extinguishing capacity of the fuse by adopting the
quartz sand for filling and connecting springs in tensional state at both ends of the fuse body, and achieves the current-limiting protective function of
cutting off a circuit at the fracture under a
high current fault and directly
cutting off the circuit by the fuse body under a
short circuit fault. The current-limiting fuse has high connecting / disconnecting capacity and good arc extinguishing capacity, and can effectively avoid the risk of damaging an
ozone generator due to faults such as
overcurrent and
short circuit by arranging the current-limiting fuse on one side of the
discharge unit of the
ozone generator.